ICON PISTONS - LS 6.0L/6.2L FT FORGED PISTON SET 4.000 BORE IC9991C.STD

ICON FHR Series Pistons for GM LS -  IC9991C.STD 

ICON FHR Series pistons for GM LS offer premium, custom options in an "off the shelf" option for your LS-family engine. FHR (Formed Head Relief) pistons have valve reliefs that are formed in as the piston blank is pressed into the die, creating a stock, but light forging. Many of the domed models are solid which allows tailoring the dome height for a specific compression ratio. They are constructed from high-strength, forged 4032 aluminum alloy for increased durability while maintaining tighter piston-to-wall clearance for increased cylinder sealing, lower cylinder wear, and stock-like noise levels, making them ideal for street and lightly boosted applications.

ICON FHR pistons for GM LS also feature:

* Mini grooves allow an overheated piston that contacts a cylinder wall to transfer heat to the wall. Friction is also reduced over a solid ring land.
* Accumulator grooves provide a reservoir area for gases that pass by the top ring. Pressure is reduced between top and second ring to help stabilize flutter and maximize ring seal.
* 0.030 in. offset wrist pins
* Round wire locks
* M42 skirt coating

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.000 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set